| From: | "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
|---|---|
| To: | "Robert Haas" <robertmhaas(at)gmail(dot)com>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Kevin Grittner" <Kgrittn(dot)CCAP(dot)Courts(at)wicourts(dot)gov> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: add_path optimization |
| Date: | 2009-02-03 17:34:31 |
| Message-ID: | 49882BC7.EE98.0025.0@wicourts.gov |
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| Thread: | |
| Lists: | pgsql-hackers |
>>> I wrote:
> I tried the same run on 8.4devel and it is still running after
> 20 minutes. I will let it cook for a while.
It's now been an hour and 30 minutes; so, while 8.4 does a much better
job of estimating how many rows will be returned, the plan it
generates is much slower for this query.
FWIW I'll attach the results of vmstat 1 below. The machine a
replication target and is receiving a little over 100 database
transactions per second, but is otherwise fairly idle, except for this
long-running query.
-Kevin
| Attachment | Content-Type | Size |
|---|---|---|
| vmstat1.txt | text/plain | 3.5 KB |
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